<template>
  <div class="login_container">
    <div class="login_box">
      <!--头像-->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="">
      </div>
      <div class="">
        <el-form ref="loginFormRef" :model="loginForm" class="login_form" :rules="loginFormRules">
          <el-form-item prop="username">
            <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
          </el-form-item>
          <el-form-item prop="password">
            <el-input v-model="loginForm.password" type="password" prefix-icon="iconfont icon-3702mima"></el-input>
          </el-form-item>
          <el-form-item class="btns">
            <el-button type="primary" @click="login">登录</el-button>
            <el-button type="info" @click="resetLoginForm">重置</el-button>
          </el-form-item>
        </el-form>
      </div>
    </div>
  </div>

</template>

<script>
export default {
  data() {
    return {
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 表单验证
      loginFormRules: {
        username: [
          { required: true, message: '登录名不能为空', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '密码不能为空', trigger: 'blur' },
          { min: 6, max: 18, message: '长度在 8 到 18 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 重置
    resetLoginForm() {
      this.$refs.loginFormRef.resetFields();
    },
    login() {
      this.$refs.loginFormRef.validate(async valid => {
        // console.log(valid);
        if (!valid) return;
        const {data: res} = await this.$http.post('login', this.loginForm);
        if (res.meta.status !== 200) return this.$message.error({message: '用户或者密码错误！'});
        this.$message.success({message: '登录成功！'});
        // 登录成功保存token 到sessionStorage
        window.sessionStorage.setItem('token', res.data.token);
        // 跳转到主页
        this.$router.push('/home');
      });
    }
  }

}
</script>

<style lang="less" scoped>
  .login_container{
    background-color: #2b4b6b;
    height: 100%;
  }
  .login_box{
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    .avatar_box{
      height: 130px;
      width: 130px;
      border: 1px solid #eee;
      border-radius: 50%;
      padding: 10px;
      box-shadow: 0 0 10px #ddd;
      position: absolute;
      left: 50%;
      transform: translate(-50%,-50%);
      background-color: #fff;
      img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
      }
    }
  }
  .login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }
  .btns{
    display: flex;
    justify-content: flex-end;
   }
</style>
